The invention discloses lactation compound feed for sows and a preparation method thereof. The lactation compound feed for sows is made from wheat, corn in northeast China, 46% soybean meal, soybean hull, calcium hydrophosphate, rice bran oil, liquid phytase, liquid compound enzyme, limestone flour, salt, 65% lysine, threonine, 60% choline chloride, antioxidant, plasma protein, potassium chloride, magnesium sulfate, vitamin prefix, and trace mineral premix. The preparation method include: weighing all materials by percent weight, and adding the materials into a crusher for crushing under the crushed size of 25-40 mesh; and adding the crushed materials into a pelletizer to make pellets at 85 DEG C with gelatinization degree reaching more than 90%. The lactation compound feed for sows has the advantages that the lactation compound feed for sows meets requirements of nursing sows for nutrition and is high in palatability, immunity, milk yield and milk quality are increased for the sows, and productivity of piglets is further improved.